CN114913168A - Fabric texture abnormity detection method - Google Patents
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Abstract
The invention relates to a fabric texture abnormity detection method, which comprises the following process steps: 1) collecting fabric image information; 2) decomposing texture characteristic information of the fabric texture; 3) extracting a texture feature vector; 4) judging and classifying texture abnormality; 5) and sending a corresponding control instruction to the lower computer according to the texture abnormal information. The fabric texture anomaly detection method extracts texture feature information based on image scale space distribution features, thereby realizing classification and identification of fabric texture anomalies; the method comprehensively considers factors of texture abnormity, improves the detection rate and ensures accurate detection results.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to a detection method of a fabric, in particular to a detection method of fabric texture abnormity, and belongs to the technical field of textile detection.
[ background of the invention ]
The textile fabric is divided into two categories of woven fabric and knitted fabric, and the woven fabric is interwoven in two directions of warp and weft to form various weave structures (plain weave, twill weave and satin weave); the knitted fabric has more complex and diversified weave structures, and the texture abnormity is inevitably generated in the weaving process to influence the fabric quality.
The fabric texture abnormity detection is a key point and difficulty of textile quality detection, and the fabric texture abnormity comprises missing stitches, pattern stitches, loose density, crossroads, broken yarns and the like. The existing fabric defect detection method is lack of a detection method aiming at fabric texture abnormity, and the detection rate is low due to the lack of understanding and comprehensive consideration of weaving technologies such as weaving mechanism, fabric structure, weaving control and the like, and the detection result is difficult to feed back to a production field to improve the fabric quality.
Therefore, in order to solve the above technical problems, it is necessary to provide an innovative method for detecting fabric texture abnormality, so as to overcome the above-mentioned drawbacks in the prior art.
[ summary of the invention ]
The invention aims to provide a fabric texture abnormity detection method which is simple in process, comprehensive in abnormity feature consideration and high in detection result accuracy.
In order to realize the purpose, the invention adopts the technical scheme that: a fabric texture anomaly detection method comprises the following process steps:
1) collecting fabric image information;
2) decomposing texture characteristic information of the fabric texture;
3) extracting a texture feature vector;
4) judging and classifying the texture abnormality;
5) and sending a corresponding control instruction to the lower computer according to the texture abnormal information.
The fabric texture abnormality detection method of the invention further comprises the following steps: the image information acquisition of the step 1) comprises the following steps:
1-1), combining a plurality of high-speed industrial cameras which are arranged at equal intervals on the width of the fabric;
1-2), a rear light source illumination mode is adopted, and the texture abnormal features of the fabric are highlighted;
1-3), the high bandwidth image acquisition card acquires image information.
The fabric texture abnormality detection method of the invention further comprises the following steps: in the step 1-2), the fabric texture abnormal features comprise holes, dropped stitches, patterned stitches, hanging stitches, dense roads, cross roads, broken yarns and triangular eyes.
The fabric texture abnormality detection method of the invention further comprises the following steps: the step 2) is specifically as follows:
2-1), spreading a fabric image through a window empirical mode to obtain a time domain and frequency domain texture characteristic signal with periodic fluctuation, and decomposing and spreading the fabric image into:
2-2), solving local maxima and minima of the signal, the modal components of which are represented as follows:
h 1 (t)=x(t)-m 1 (t);
2-3), surrounding the extreme points by adopting a cubic spline curve;
2-4), calculating the average value m of the enclosing lines of the extreme points 1 (t);
2-5) carrying out signal screening on the average value signal based on the original signal, wherein the specific method is as follows:
r 1 (t)=x(t)-c 1 (t)
2-6), the screening signal is compared with the standard deviation for control, and the following steps are carried out:
2-7), obtaining a new signal after the difference between the original signal and the screening signal, namely:
The fabric texture abnormality detection method of the invention further comprises the following steps: the step 3) is specifically as follows:
3-1), dividing the texture characteristics of the fabric into a coil (texture element) and a string-sleeve relation (space dependency relation);
3-2), acquiring a feature vector of the uniformity degree of the gray level distribution of the image and a feature vector of the complexity degree through a gray level co-occurrence matrix; setting a direction parameter a and a direction parameter b of an image with M multiplied by N and S gray scale, wherein the value can be 0 or 1; if the gray value of any point (x, y) in the image is i, the gray value of the point (x + a, y + b) is j, and (i, j) is a gray level symbiotic point;
3-3), expressing the characteristic vector of the texture change track through the direction degree, wherein the formula is as follows:
wherein n is p Is the number of peaks in the probability histogram, P is the peak point, phi p Is the center point of wave front, w p The trough distance on both sides of the peak, H D (phi) is the edge probability;
3-3), fusing a plurality of groups of feature vectors, wherein the fusion feature CWI is expressed as: CWI ═ a + E + F.
The fabric texture abnormality detection method of the invention further comprises the following steps: the step 4) is specifically as follows:
4-1), building an evolutionary neural network model;
4-2), carrying out global optimization in an evolutionary neural network to obtain an initialization population of an optimal Harris eagle model, wherein the position vector of the Harris eagle model is expressed as follows:
wherein X prey (t) is the optimal position, X (t) represents the current position, X rand (t) is a random position, r i Is [0,1 ]]UB, LB are the upper and lower limits of the variables, Xm (t) is the average position of the individual, expressed as:
4-3), optimizing the weight value (w) and the bias value (b) in the optimal Harris eagle model to obtain an optimal regularization extreme learning machine, which is expressed as: h is i (x)=g(w i ,b i ,x)=g(w i x+b i ) Wherein g (x) is a Sigmoid activation function;
4-4) performing texture abnormity judgment and classification detection based on an improved regularization extreme learning machine.
The fabric texture abnormality detection method of the invention may further include: the specific method for building the evolutionary neural network model comprises the following steps:
randomly generating an initial population of size M × N, whose individual representations:
X i (0)=[x i,1 (0),x i,2 (0),x i,3 (0),......,x i,N (0)](i ═ 1, 2, 3.... M), where X is i,j (0) Representing 0 generation population, and the number of initial population is 50;
the DE algorithm is used to implement individual variation, expressed as:
V i (g)=X best (g)+,[X p1 (g)-X p2 (g)]+F·[X p3 (g)-X p4 (g)]wherein X is best (g) Represents the bestIndividual, X pi (g) Representing random individuals, the value of the scaling factor F is 1;
the cross variation is expressed as:wherein cr is [0,1 ]]Selecting the cross probability cr value to be 0.8;
compared with the prior art, the invention has the following beneficial effects:
1. the fabric texture anomaly detection method extracts texture feature information based on image scale space distribution features, thereby realizing classification and identification of fabric texture anomalies.
2. The fabric texture abnormity detection method comprehensively considers the factors of texture abnormity, improves the detection rate and ensures that the detection result is accurate.
3. The fabric texture abnormity detection method can issue corresponding control instructions to production field equipment according to the texture abnormity information, thereby improving the production quality of the fabric.
[ description of the drawings ]
Fig. 1 is an overall flowchart of a fabric texture abnormality detection method of the present invention.
FIG. 2 is a flow chart of the decomposition of the texture characteristic information of the fabric in the step 2) of the invention.
FIG. 3 is a flow chart of the present invention for extracting the texture feature vector of the fabric in step 3).
FIG. 4 is a flowchart of texture anomaly determination and classification detection in step 4) of the present invention.
[ detailed description ] embodiments
Referring to the attached drawings 1 to 4 in the specification, the invention relates to a fabric texture abnormity detection method, which comprises the following process steps:
1) collecting fabric image information; the method specifically comprises the following steps:
1-1), combining a plurality of high-speed industrial cameras which are arranged at equal intervals on the width of the fabric;
1-2), a rear light source illumination mode is adopted, and the texture abnormal features of the fabric are highlighted;
1-3), the high bandwidth image acquisition card acquires image information.
2) Decomposing texture characteristic information of the fabric texture; please refer to fig. 2 of the specification, which specifically includes the following steps:
2-1), spreading a fabric image through a window empirical mode to obtain a time domain and frequency domain texture characteristic signal with periodic fluctuation, and decomposing and spreading the fabric image into:the fabric texture abnormal features comprise holes, drop stitches, pattern stitches, drop stitches, thick roads, transverse roads, broken yarns and triangular eyes.
2-2), solving local maxima and minima of the signal, the modal components of which are represented as follows:
h 1 (t)=x(t)-m 1 (t)。
2-3), and surrounding the extreme points by a cubic spline curve.
2-4), calculating the average value m of the enclosing lines of the extreme points 1 (t)。
2-5) performing signal screening on the average value signal based on the original signal, wherein the specific method is as follows:
r 1 (t)=x(t)-c 1 (t)。
2-6), the screening signal is compared with the standard deviation for control, and the following steps are carried out:
2-7), obtaining a new signal after the difference between the original signal and the screening signal, namely:
3) Extracting a texture feature vector; please refer to fig. 3 of the specification, which specifically includes the following steps:
3-1), dividing the texture characteristics of the fabric into a coil and string sleeve relationship;
3-2), acquiring a feature vector of the image gray level distribution uniformity and a feature vector of the complexity through a gray level co-occurrence matrix; setting a direction parameter a and a direction parameter b of an image with M multiplied by N and S gray scale, wherein the value can be 0 or 1; if the gray value of any point (x, y) in the image is i, the gray value of the point (x + a, y + b) is j, and (i, j) is a gray level symbiotic point;
3-3), expressing the characteristic vector of the texture change track through the direction degree, wherein the formula is as follows:
wherein n is p Is the number of peaks in the probability histogram, P is the peak point, phi p Is the center point of wave front, w p The trough distance on both sides of the peak, H D (phi) is the edge probability;
3-3), fusing a plurality of groups of feature vectors, wherein the fusion feature CWI is expressed as: CWI ═ a + E + F.
4) Judging and classifying texture abnormality; please refer to fig. 4 in the specification, which specifically includes the following steps:
4-1), constructing an evolutionary neural network model, wherein the specific method comprises the following steps:
the specific method comprises the following steps:
randomly generating an initial population of size M × N, whose individual representations:
X i (0)=[x i,1 (0),x i,2 (0),x i,3 (0),......,x i,N (0)](i ═ 1, 2, 3.... M), where X is i,j (0) Representing 0 generation population, and the number of initial population is 50;
the DE algorithm is used to implement individual variation, which is expressed as:
V i (g)=X best (g)+F·[X p1 (g)-X p2 (g)]+F·[x p3 (g)-X p4 (g)]wherein X is best (g) Represents the best individual, X pi (g) Representing random individuals, the value of the scaling factor F is 1;
the cross variation is expressed as:wherein cr is [0,1 ]]Selecting the cross probability cr value to be 0.8;
4-2), carrying out global optimization in an evolutionary neural network to obtain an initialization population of an optimal Harris eagle model, wherein the position vector of the Harris eagle model is expressed as follows:
wherein X prey (t) is the optimal position, X (t) represents the current position, X rand (t) is a random position, r i Is [0,1 ]]UB, LB are the upper and lower limits of the variables, Xm (t) is the average position of the individual, expressed as:
4-3), optimizing the weight value (w) and the bias value (b) in the optimal Harris eagle model to obtain an optimal regularization extreme learning machine, which is expressed as: h is a total of i (x)=g(w i ,b i ,x)=g(w i x+b i ) Wherein g (x) is a Sigmoid activation function;
4-4) performing texture abnormity judgment and classification detection based on an improved regularization extreme learning machine.
5) And sending a corresponding control instruction to the lower computer according to the texture abnormal information.
The fabric texture anomaly detection method comprehensively considers factors of texture anomaly, improves the detection rate and ensures that the detection result is accurate; meanwhile, a corresponding control command can be issued to production field equipment according to the texture abnormal information, so that the production quality of the fabric is improved.
The above embodiments are merely preferred embodiments of the present disclosure, which are not intended to limit the present disclosure, and any modifications, equivalents, improvements and the like, which are within the spirit and principle of the present disclosure, should be included in the scope of the present disclosure.
Claims (7)
1. A fabric texture anomaly detection method is characterized by comprising the following steps: the method comprises the following process steps:
1) collecting fabric image information;
2) decomposing texture characteristic information of the fabric texture;
3) extracting a texture feature vector;
4) judging and classifying texture abnormality;
5) and sending a corresponding control instruction to the lower computer according to the texture abnormity information.
2. The fabric texture abnormality detection method according to claim 1, characterized in that: the image information acquisition of the step 1) comprises the following steps:
1-1), combining a plurality of high-speed industrial cameras which are arranged at equal intervals on the width of the fabric;
1-2), a rear light source illumination mode is adopted, and the texture abnormal features of the fabric are highlighted;
1-3), the high bandwidth image acquisition card acquires image information.
3. The fabric texture abnormality detection method according to claim 2, characterized in that: in the step 1-2), the fabric texture abnormal features comprise holes, dropped stitches, patterned stitches, hanging stitches, dense roads, cross roads, broken yarns and triangular eyes.
4. The fabric texture abnormality detection method according to claim 1, characterized in that: the step 2) is specifically as follows:
2-1), spreading a fabric image through a window empirical mode to obtain a time domain and frequency domain texture characteristic signal with periodic fluctuation, and decomposing and spreading the fabric image into:
2-2), solving local maxima and minima of the signal, the modal components of which are represented as follows:
h 1 (t)=x(t)-m 1 (t);
2-3), surrounding the extreme points by adopting a cubic spline curve;
2-4), calculating the average value m of the enclosing lines of the extreme points 1 (t);
2-5) carrying out signal screening on the average value signal based on the original signal, wherein the specific method is as follows:
r 1 (t)=x(t)-c 1 (t)
2-6), the screening signal is compared with the standard deviation for control, and the following steps are carried out:
2-7), obtaining a new signal after the difference between the original signal and the screening signal, namely:
5. The fabric texture abnormality detection method according to claim 1, characterized in that: the step 3) is specifically as follows:
3-1), dividing the texture characteristics of the fabric into a coil and string sleeve relationship;
3-2), acquiring a feature vector of the image gray level distribution uniformity and a feature vector of the complexity through a gray level co-occurrence matrix; setting a direction parameter a and a direction parameter b of an image with M multiplied by N and S gray scale, wherein the value can be 0 or 1; if the gray value of any point (x, y) in the image is i, the gray value of the point (x + a, y + b) is j, and (i, j) is a gray level symbiotic point;
3-3), expressing the characteristic vector of the texture change track through the direction degree, wherein the formula is as follows:
wherein n is p Is the number of peaks in the probability histogram, P is the peak point, φ p Is the center point of wave front, w p The trough distance on both sides of the peak, H D (phi) is the edge probability;
3-3), fusing a plurality of groups of feature vectors, wherein the fusion feature CWI is expressed as: CWI ═ a + E + F.
6. The fabric texture abnormality detection method according to claim 1, characterized in that: the step 4) is specifically as follows:
4-1), building an evolutionary neural network model;
4-2), carrying out global optimization in an evolutionary neural network to obtain an initialization population of an optimal Harris eagle model, wherein the position vector of the Harris eagle model is expressed as follows:
wherein X prey (t) is the optimal position, X (t) represents the current position, X rand (t)Is a random position, r i Is [0,1 ]]UB, LB are the upper and lower limits of the variables, Xm (t) is the average position of the individual, expressed as:
4-3), optimizing the weight value (w) and the bias value (b) in the optimal Harris eagle model to obtain an optimal regularization extreme learning machine, which is expressed as: h is i (x)=g(w i ,b i ,x)=g(w i x+b i ) Wherein g (x) is a Sigmoid activation function;
4-4) performing texture abnormity judgment and classification detection based on an improved regularization extreme learning machine.
7. The fabric texture abnormality detection method according to claim 6, characterized in that: the specific method for constructing the evolutionary neural network model comprises the following steps:
randomly generating an initial population of size M × N, whose individual representations: x i (0)=[x i,1 (0),x i,2 (0),x i,3 (0),......,x i,N (0)](i ═ 1, 2, 3.... M), where X is i,j (0) Representing 0 th generation of population, and the number of initial population is 50;
the DE algorithm is used to implement individual variation, which is expressed as: v i (g)=X best (g)+F·[X p1 (g)-X p2 (g)]+F·[X p3 (g)-X p4 (g)]Wherein X is best (g) Represents the best individual, X pi (g) Representing random individuals, and the value of a scaling factor F is 1;
the cross variation is expressed as:wherein cr is [0,1 ]]Selecting the cross probability cr value to be 0.8;
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